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46 results on '"Zhang, Jiantao"'

9. A Free-Rotation Asymmetric Magnetic Coupling Structure of UAV Wireless Charging Platform With Conformal Pickup.

Author

Bie, Zhi, Zhang, Jiantao, Song, Kai, Wang, Deaan, and Zhu, Chunbo

Subjects
*MAGNETIC structure, *WIRELESS power transmission, *MAGNETIC fields, *MAGNETIC materials, *MUTUAL inductance, *ROTATIONAL motion
Abstract

This article proposes an asymmetric magnetic coupler using the horizontal magnetic field to realize the conformal and lightweight unmanned aerial vehicle (UAV) side pickup mechanism and solve the problems of rotation misalignment and horizontal offset of UAVs. The novel structure uses multiple groups of series circular coils as the transmitting coil to construct a uniform near harness horizontal magnetic field. The solenoid structure covered with flexible magnetic material is used as the receiver, which is attached to the UAV landing gear. A 200-W prototype is produced to validate the proposed structure. The system can maintain smooth mutual inductance with a dc–dc efficiency of 90% under a ±20 mm offset and free-rotation. [ABSTRACT FROM AUTHOR]

Published
2022
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14. Research and Improvement of Asymmetrical Magnetic Coupler of Inspection Robot Wireless Charging System

Author

Chunbo Zhu, Leran Zheng, De'an Wang, Zhang Jiantao, Kai Song, and Zhi Bie

Subjects
Power transmission, Chassis, business.industry, Computer science, 020208 electrical & electronic engineering, Magnetic separation, Electrical engineering, 020206 networking & telecommunications, 02 engineering and technology, Magnetic flux, Magnetic field, Inductance, Electromagnetic coil, 0202 electrical engineering, electronic engineering, information engineering, Wireless, business
Abstract

Asymmetrical magnetic couplers are often applied in the wireless charging system of inspection robots with strong misalignment adaptability. When a specific range misalignment occurs on the receiving coil, the mutual inductance between the transmitting coil and the receiving coil remains almost constant, thereby ensuring stable power transmission. However, since the bottom chassis of the inspection robot is made of aluminum, it will affect the original asymmetric magnetic coupler's magnetic field distribution and thus lose the effect of mutual inductance stability. This paper analyzes the failure mechanism of a uniform magnetic field caused by metal and improves the original magnetic coupler on this basis to restore the stability of mutual inductance.

Published
2020

15. Optimization Design of Distributed Drive Vehicle Reducer Based on Improved Particle Swarm Optimization Algorithm

Author

Xiang Xu, Chen Xinbo, Jiawei Chen, Zhongyan Lin, and Zhang Jiantao

Subjects
Matching (graph theory), Reducer, Computer science, business.industry, media_common.quotation_subject, Volume (computing), Particle swarm optimization, Fuzzy control system, Kinematics, Physics::Classical Physics, Inertia, GeneralLiterature_MISCELLANEOUS, Computer Science::Robotics, Software, Astrophysics::Earth and Planetary Astrophysics, business, Algorithm, media_common
Abstract

Aiming at the compact structure of the wheel side of the distributed drive vehicle, this paper proposed to optimize the volume of the planetary gear reducer of the wheel side drive system as the optimization goal. Under the condition of satisfying performance and planetary gear matching constraints, the improved particle swarm optimization (PSO) algorithm was used to optimize the design of the original planetary gear reducer. The fuzzy system was used to adaptively optimize the inertia weight of the PSO algorithm, and two learning factors were changed linearly as the iteration progressed. The volume of the optimized planetary gear reducer was 663589.9 mm3, which was 33.31% less than the volume before optimization of 994987.5 mm3. ADAMS software was used to model the optimized planetary gear parameters and performed kinematics and dynamics simulations, the rationality of the planetary gear parameters optimized by the improved PSO algorithm was verified, and the impact load of the gear can be effectively reduced.

Published
2020

16. Research on Electromagnetic Compatibility of Non-Contact Slip Ring

Author

Zhang Jiantao, Kai Song, Xinyu Zhang, Zhou Tian, and Chunbo Zhu

Subjects
010302 applied physics, Materials science, 020208 electrical & electronic engineering, Electromagnetic compatibility, 02 engineering and technology, 01 natural sciences, Nanocrystalline material, Electromagnetic interference, Slip ring, Inductance, Reliability (semiconductor), 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Maximum power transfer theorem, Wireless power transfer, Composite material
Abstract

Compared to traditional contact power transfer by slip ring, the wireless power transfer applied to slip ring has more advantages which could reudce the mechanical wear and improve the reliability. In this paper, the crystalline nanocrystalline is proved to have a higher electromagnetic compatibility in slip ring compared with other various magnetic meterials. Meanwhile, the structure design of non-contact slip ring also is discussed in this paper. And the simulation results show that the thickness and open hole caliber of shiled has weak influence for mutual inductance between primary and secondary coils.

Published
2020

21. A Novel Arc-Shaped Lightweight Magnetic Coupler for AUV Wireless Power Transfer.

Author

Wang, De'an, Cui, Shumei, Zhang, Jiantao, Bie, Zhi, Song, Kai, and Zhu, Chunbo

Subjects
WIRELESS power transmission, MAGNETIC cores, SOFT magnetic materials, MAGNETIC alloys, AUTONOMOUS underwater vehicles, MAGNETIC materials
Abstract

The underwater wireless power transfer (UWPT) technology provides a feasible way to solve the problems of the traditional power supply method of the autonomous underwater vehicle (AUV). The magnetic coupler is the most essential component in the wireless power transfer system. Its configuration determines its applicable scenarios, and its parameter design and optimization will directly affect the system's overall output power and efficiency. In this article, an arc-shaped underwater wireless power transfer magnetic coupler is proposed, which is suitable for AUV's curved shell. Especially, the proposed novel magnetic coupler utilizes Fe-based nanocrystalline alloy soft magnetic material as the magnetic core. Both volume and weight of the receiver are reduced compared with the traditional Mn-Zn ferrite material. Fe-based nanocrystalline alloy material provides a novel design idea for the magnetic coupler on electrical equipment with special-shaped shell due to its flexibility. A prototype of the UWPT system for 320 mm diameter AUV is built, and it can transfer 3 kW power in the experiment with a dc–dc efficiency of 91.9% at the forward maximum output power point. Compared with the structure with ferrite core, the volume of the proposed structure is reduced by 41.1%, and the weight is reduced by 42.6%, so that the expected effect has been achieved. [ABSTRACT FROM AUTHOR]

Published
2022
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23. Smart Design of Z -Width Expanded Thumb Haptic Interface Using Magnetorheological Fluids.

Author

Yin, Xuanchun, Wu, Chan, Wen, Sheng, and Zhang, Jiantao

Subjects
MAGNETORHEOLOGICAL fluids, THUMB, ARTIFICIAL intelligence, MATHEMATICAL expansion, STABILITY criterion
Abstract

In the human-in-the-loop robot-assisted telemanipulation application scenario, artificial intelligence and sensors technology were utilized to improve autonomous levels of operation. However, in some special application cases, human decision-making plays a crucial role, haptic display of interaction between the robot end-effector, and a virtual or real remote environment is of significant importance. To this end, this article proposed a new approach to expanding $Z$ -width by introducing magnetorheological fluids (MRFs) and the spring element hybrid actuation mechanism. Then, system stability and human decision-making based on perceiving transparency theory are further analyzed. Moreover, a hybrid actuation mechanism-based $Z$ -width expansion mathematical model is established while its control scheme-related parameters design is presented. Furthermore, $Z$ -width expansion experimental results demonstrated the effectiveness of this hybrid actuation mechanism by introducing MRFs and the spring element. A fabricated thumb haptic interface as a master controller can effectively reflect the $Z$ -width of the remote environment in a robot-assisted telemanipulation application scenario. [ABSTRACT FROM AUTHOR]

Published
2021
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31. Study of a 6DOF robot assisted ultrasound scanning system and its simulated control handle

Author

Xiong Linfei, Hou Xilong, Guan Xiaolong, Wang Ban, Wu Haotian, Teng Qing, Zhang Jiantao, Wei Shiyou, Jiang Tao, and Yang Jialin

Subjects
Robot kinematics, Diagnostic methods, Computer science, business.industry, Remote diagnosis, education, 020208 electrical & electronic engineering, Ultrasound, 02 engineering and technology, Kinematics, Robotic systems, 0202 electrical engineering, electronic engineering, information engineering, Robot, 020201 artificial intelligence & image processing, Computer vision, Artificial intelligence, business, Ultrasound image
Abstract

Ultrasound scanning is a commonly used diagnostic method in hospital because of its' high efficiency and limited side effects. In this paper, a robot assisted ultrasound scanning system was developed to help doctors do the remote diagnosis. Doctor could control the ultrasound probe through the Internet from a remote place and receive the ultrasound image in real time. Simultaneously, the robot system does not need to change the doctors' habits for the ultrasound diagnosis and it could be used by doctors quickly.

Published
2017

32. Model-Based Control for Grid-Tied Inverters Operated in Discontinuous Current Mode With Low Harmonic Current Distortion.

Author

Zhang, Jiantao, Isobe, Takanori, and Tadano, Hiroshi

Abstract

Low-power grid-tied inverters can be designed to operate in a discontinuous current mode (DCM) with a model-based feedforward control, which can be advantageous for further increasing the switching frequency to achieve high power density. However, current distortions can be generated due to the parasitic capacitance of the devices. To address the issue, an improved modulation for the DCM is proposed in this article. We describe the proposed modulation and, then, demonstrate its improved performance by a time-domain simulation. We also discuss the proposed modulation in comparison with another method that has been proposed previously. The proposed method is also verified by experiments using a 400-W laboratory prototype. A significant improvement in the current harmonics by the improved modulation has been confirmed. [ABSTRACT FROM AUTHOR]

Published
2020
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44. The engineering design and economic evaluation of CBM cluster wells in fanzhuang block

Author

Zhang Jiantao, Li Jingkuang, Zhang Weidong, and Guo Min

Subjects
Engineering, Petroleum engineering, business.industry, Drilling fluid, Economic evaluation, Trajectory, Cluster (physics), Drilling, Engineering design process, business, Surface conditions, Block (data storage)
Abstract

Qinshui Basin in Shanxi province is the most active CBM (Coalbed Mathane) development area in China. Due to the complicated surface conditions, it is difficult to construct drilling site. Therefore, given the cost and the area covered, we decide to adopt cluster wells. This paper describes the characteristics, applicability, well pattern arrangement of cluster wells and its optimum design of well trajectory, including the well pattern arrangements of four, five and nine well-composition cluster wells and the comparison of optimum designs of well trajectory between four and nine well-composition cluster wells based on well TL-004. The results suggest that it is reasonable to apply four well-composition cluster wells. In addition, the paper also introduces the drilling technologies, like BHA design, drilling fluid design and cementing technology. Meanwhile it carries on economic evaluation for vertical wells, four and nine well-composition cluster wells, and finally considers four well-composition cluster wells to be the most economical technique.

Published
2011

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